12781434 has 8 divisors (see below), whose sum is σ = 25562880. Its totient is φ = 4260476.

The previous prime is 12781429. The next prime is 12781441. The reversal of 12781434 is 43418721.

12781434 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

12781434 is an admirable number.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1065114 + ... + 1065125.

It is an arithmetic number, because the mean of its divisors is an integer number (3195360).

Almost surely, 2^12781434 is an apocalyptic number.

12781434 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12781434 is a wasteful number, since it uses less digits than its factorization.

12781434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2130244.

The product of its digits is 5376, while the sum is 30.

The square root of 12781434 is about 3575.1131450627. The cubic root of 12781434 is about 233.8082657615.

The spelling of 12781434 in words is "twelve million, seven hundred eighty-one thousand, four hundred thirty-four".